Six years of high-resolution monitoring data of 40 borehole heat exchangers

This dataset provides six years of monitoring data of the ground heat exchanger that supplies heat and cold to the E.ON Energy Research Center located in Aachen, Germany. The data belong to the following publication:

Heim, E., Stoffel, P., Müller, D., & Klitzsch, N. (2024). Six years of high-resolution monitoring data of 40 borehole heat exchangers. Scientific Data, 11(1), 1334. https://doi.org/10.1038/s41597-024-04241-9

The ground heat exchanger consists of 40 double-U-loop borehole heat exchangers (BHE), that are arranged in three subfields. Each subfield is connected to an underground vault, in which sensors for the inlet fluid temperature, the outlet fluid temperature and the volume flow of each BHE are placed. The sensors record data in 30-second intervals. Coherent data is provided from July 1, 2018 to June 30, 2024 in two time resolutions and processing levels:

Raw data: The raw data in its initial resolution, aligned to coherent 30-second timestamps.

Prepared data: The raw data was resampled to 5 minute intervals using the weighted mean, with the volume flow as weight. Moreover, data periods that are not representative of the thermal exchange process in the BHE were masked (e.g., no-flow periods).

Both raw and prepared data are provided as .csv files for each month individually. Temperature measurements are given in °C, the volume flow rate in l/min. 

In addition, a supporting file indicating the BHE locations is provided. It also contains the length of the horizontal connecting pipes going from the underground vaults (where the sensors are placed) to the BHE heads. 

Code explaining how to open and work with the data is provided in a separate github repository: https://github.com/elimh/ERC_BHEfield_Data_Code